1 /* GStreamer OSS Mixer implementation
2 * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
4 * gstossmixer.c: mixer interface implementation for OSS
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
32 #include <sys/ioctl.h>
33 #include <sys/soundcard.h>
35 #include "gstossmixer.h"
37 #define MASK_BIT_IS_SET(mask, bit) \
40 static void gst_ossmixer_track_class_init (GstOssMixerTrackClass * klass);
41 static void gst_ossmixer_track_init (GstOssMixerTrack * track);
43 static gboolean gst_ossmixer_supported (GstImplementsInterface * iface,
45 static const GList *gst_ossmixer_list_tracks (GstMixer * ossmixer);
47 static void gst_ossmixer_set_volume (GstMixer * ossmixer,
48 GstMixerTrack * track, gint * volumes);
49 static void gst_ossmixer_get_volume (GstMixer * ossmixer,
50 GstMixerTrack * track, gint * volumes);
52 static void gst_ossmixer_set_record (GstMixer * ossmixer,
53 GstMixerTrack * track, gboolean record);
54 static void gst_ossmixer_set_mute (GstMixer * ossmixer,
55 GstMixerTrack * track, gboolean mute);
57 static const gchar **labels = NULL;
58 static GstMixerTrackClass *parent_class = NULL;
60 /* three functions: firstly, OSS has the nasty habit of inserting
61 * spaces in the labels, we want to get rid of them. Secondly,
62 * i18n is impossible with OSS' way of providing us with mixer
63 * labels, so we make a 'given' list of i18n'ed labels. Since
64 * i18n doesn't actually work, we fake it (FIXME). Thirdly, I
65 * personally don't like the "1337" names that OSS gives to their
66 * labels ("Vol", "Mic", "Rec"), I'd rather see full names. */
73 gchar *origs[SOUND_MIXER_NRDEVICES] = SOUND_DEVICE_LABELS;
76 gchar *given, *wanted;
78 /* Note: this list is simply ripped from soundcard.h. For
79 * some people, some values might be missing (3D surround,
80 * etc.) - feel free to add them. That's the reason why
81 * I'm doing this in such a horribly complicated way. */
83 "Vol ", _("Volume")}, {
84 "Bass ", _("Bass")}, {
85 "Trebl", _("Treble")}, {
86 "Synth", _("Synth")}, {
88 "Spkr ", _("Speaker")}, {
89 "Line ", _("Line-in")}, {
90 "Mic ", _("Microphone")}, {
92 "Mix ", _("Mixer")}, {
93 "Pcm2 ", _("PCM-2")}, {
94 "Rec ", _("Record")}, {
95 "IGain", _("In-gain")}, {
96 "OGain", _("Out-gain")}, {
97 "Line1", _("Line-1")}, {
98 "Line2", _("Line-2")}, {
99 "Line3", _("Line-3")}, {
100 "Digital1", _("Digital-1")}, {
101 "Digital2", _("Digital-2")}, {
102 "Digital3", _("Digital-3")}, {
103 "PhoneIn", _("Phone-in")}, {
104 "PhoneOut", _("Phone-out")}, {
105 "Video", _("Video")}, {
106 "Radio", _("Radio")}, {
107 "Monitor", _("Monitor")}, {
111 labels = g_malloc (sizeof (gchar *) * SOUND_MIXER_NRDEVICES);
113 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
114 for (pos = 0; cases[pos].given != NULL; pos++) {
115 if (!strcmp (cases[pos].given, origs[i])) {
116 labels[i] = g_strdup (cases[pos].wanted);
120 if (cases[pos].given == NULL)
121 labels[i] = g_strdup (origs[i]);
126 gst_ossmixer_track_get_type (void)
128 static GType gst_ossmixer_track_type = 0;
130 if (!gst_ossmixer_track_type) {
131 static const GTypeInfo ossmixer_track_info = {
132 sizeof (GstOssMixerTrackClass),
135 (GClassInitFunc) gst_ossmixer_track_class_init,
138 sizeof (GstOssMixerTrack),
140 (GInstanceInitFunc) gst_ossmixer_track_init,
144 gst_ossmixer_track_type =
145 g_type_register_static (GST_TYPE_MIXER_TRACK,
146 "GstOssMixerTrack", &ossmixer_track_info, 0);
149 return gst_ossmixer_track_type;
153 gst_ossmixer_track_class_init (GstOssMixerTrackClass * klass)
155 parent_class = g_type_class_ref (GST_TYPE_MIXER_TRACK);
159 gst_ossmixer_track_init (GstOssMixerTrack * track)
161 track->lvol = track->rvol = 0;
162 track->track_num = 0;
166 gst_ossmixer_track_new (GstOssElement * oss,
167 gint track_num, gint max_chans, gint flags)
169 GstOssMixerTrack *osstrack;
170 GstMixerTrack *track;
176 osstrack = g_object_new (GST_TYPE_OSSMIXER_TRACK, NULL);
177 track = GST_MIXER_TRACK (osstrack);
178 track->label = g_strdup (labels[track_num]);
179 track->num_channels = max_chans;
180 track->flags = flags;
181 track->min_volume = 0;
182 track->max_volume = 100;
183 osstrack->track_num = track_num;
186 if (ioctl (oss->mixer_fd, MIXER_READ (osstrack->track_num), &volume) < 0) {
187 g_warning ("Error getting device (%d) volume: %s",
188 osstrack->track_num, strerror (errno));
191 osstrack->lvol = (volume & 0xff);
192 if (track->num_channels == 2) {
193 osstrack->rvol = ((volume >> 8) & 0xff);
200 gst_oss_interface_init (GstImplementsInterfaceClass * klass)
202 /* default virtual functions */
203 klass->supported = gst_ossmixer_supported;
207 gst_ossmixer_interface_init (GstMixerClass * klass)
209 GST_MIXER_TYPE (klass) = GST_MIXER_HARDWARE;
211 /* default virtual functions */
212 klass->list_tracks = gst_ossmixer_list_tracks;
213 klass->set_volume = gst_ossmixer_set_volume;
214 klass->get_volume = gst_ossmixer_get_volume;
215 klass->set_mute = gst_ossmixer_set_mute;
216 klass->set_record = gst_ossmixer_set_record;
220 gst_ossmixer_supported (GstImplementsInterface * iface, GType iface_type)
222 g_assert (iface_type == GST_TYPE_MIXER);
224 return (GST_OSSELEMENT (iface)->mixer_fd != -1);
228 gst_ossmixer_contains_track (GstOssElement * oss, GstOssMixerTrack * osstrack)
232 for (item = oss->tracklist; item != NULL; item = item->next)
233 if (item->data == osstrack)
240 gst_ossmixer_list_tracks (GstMixer * mixer)
242 return (const GList *) GST_OSSELEMENT (mixer)->tracklist;
246 gst_ossmixer_get_volume (GstMixer * mixer,
247 GstMixerTrack * track, gint * volumes)
250 GstOssElement *oss = GST_OSSELEMENT (mixer);
251 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
253 /* assert that we're opened and that we're using a known item */
254 g_return_if_fail (oss->mixer_fd != -1);
255 g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
257 if (track->flags & GST_MIXER_TRACK_MUTE) {
258 volumes[0] = osstrack->lvol;
259 if (track->num_channels == 2) {
260 volumes[1] = osstrack->rvol;
264 if (ioctl (oss->mixer_fd, MIXER_READ (osstrack->track_num), &volume) < 0) {
265 g_warning ("Error getting recording device (%d) volume: %s",
266 osstrack->track_num, strerror (errno));
270 osstrack->lvol = volumes[0] = (volume & 0xff);
271 if (track->num_channels == 2) {
272 osstrack->rvol = volumes[1] = ((volume >> 8) & 0xff);
278 gst_ossmixer_set_volume (GstMixer * mixer,
279 GstMixerTrack * track, gint * volumes)
282 GstOssElement *oss = GST_OSSELEMENT (mixer);
283 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
285 /* assert that we're opened and that we're using a known item */
286 g_return_if_fail (oss->mixer_fd != -1);
287 g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
289 /* prepare the value for ioctl() */
290 if (!(track->flags & GST_MIXER_TRACK_MUTE)) {
291 volume = (volumes[0] & 0xff);
292 if (track->num_channels == 2) {
293 volume |= ((volumes[1] & 0xff) << 8);
297 if (ioctl (oss->mixer_fd, MIXER_WRITE (osstrack->track_num), &volume) < 0) {
298 g_warning ("Error setting recording device (%d) volume (0x%x): %s",
299 osstrack->track_num, volume, strerror (errno));
304 osstrack->lvol = volumes[0];
305 if (track->num_channels == 2) {
306 osstrack->rvol = volumes[1];
311 gst_ossmixer_set_mute (GstMixer * mixer, GstMixerTrack * track, gboolean mute)
314 GstOssElement *oss = GST_OSSELEMENT (mixer);
315 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
317 /* assert that we're opened and that we're using a known item */
318 g_return_if_fail (oss->mixer_fd != -1);
319 g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
324 volume = (osstrack->lvol & 0xff);
325 if (MASK_BIT_IS_SET (oss->stereomask, osstrack->track_num)) {
326 volume |= ((osstrack->rvol & 0xff) << 8);
330 if (ioctl (oss->mixer_fd, MIXER_WRITE (osstrack->track_num), &volume) < 0) {
331 g_warning ("Error setting mixer recording device volume (0x%x): %s",
332 volume, strerror (errno));
337 track->flags |= GST_MIXER_TRACK_MUTE;
339 track->flags &= ~GST_MIXER_TRACK_MUTE;
344 gst_ossmixer_set_record (GstMixer * mixer,
345 GstMixerTrack * track, gboolean record)
347 GstOssElement *oss = GST_OSSELEMENT (mixer);
348 GstOssMixerTrack *osstrack = GST_OSSMIXER_TRACK (track);
350 /* assert that we're opened and that we're using a known item */
351 g_return_if_fail (oss->mixer_fd != -1);
352 g_return_if_fail (gst_ossmixer_contains_track (oss, osstrack));
354 /* if there's nothing to do... */
355 if ((record && GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)) ||
356 (!record && !GST_MIXER_TRACK_HAS_FLAG (track, GST_MIXER_TRACK_RECORD)))
359 /* if we're exclusive, then we need to unset the current one(s) */
360 if (oss->mixcaps & SOUND_CAP_EXCL_INPUT) {
363 for (track = oss->tracklist; track != NULL; track = track->next) {
364 GstMixerTrack *turn = (GstMixerTrack *) track->data;
366 turn->flags &= ~GST_MIXER_TRACK_RECORD;
371 /* set new record bit, if needed */
373 oss->recdevs |= (1 << osstrack->track_num);
375 oss->recdevs &= ~(1 << osstrack->track_num);
378 /* set it to the device */
379 if (ioctl (oss->mixer_fd, SOUND_MIXER_WRITE_RECSRC, &oss->recdevs) < 0) {
380 g_warning ("Error setting mixer recording devices (0x%x): %s",
381 oss->recdevs, strerror (errno));
386 track->flags |= GST_MIXER_TRACK_RECORD;
388 track->flags &= ~GST_MIXER_TRACK_RECORD;
393 gst_ossmixer_build_list (GstOssElement * oss)
395 gint i, devmask, master = -1;
396 const GList *pads = gst_element_get_pad_list (GST_ELEMENT (oss));
397 GstPadDirection dir = GST_PAD_UNKNOWN;
399 #ifdef SOUND_MIXER_INFO
400 struct mixer_info minfo;
403 g_return_if_fail (oss->mixer_fd == -1);
405 oss->mixer_fd = open (oss->mixer_dev, O_RDWR);
406 if (oss->mixer_fd == -1) {
407 /* this is valid. OSS devices don't need to expose a mixer */
408 GST_DEBUG ("Failed to open mixer device %s, mixing disabled: %s",
409 oss->mixer_dev, strerror (errno));
414 if (pads && g_list_length ((GList *) pads) == 1)
415 dir = GST_PAD_DIRECTION (GST_PAD (pads->data));
418 if (ioctl (oss->mixer_fd, SOUND_MIXER_READ_RECMASK, &oss->recmask) < 0 ||
419 ioctl (oss->mixer_fd, SOUND_MIXER_READ_RECSRC, &oss->recdevs) < 0 ||
420 ioctl (oss->mixer_fd, SOUND_MIXER_READ_STEREODEVS, &oss->stereomask) < 0
421 || ioctl (oss->mixer_fd, SOUND_MIXER_READ_DEVMASK, &devmask) < 0
422 || ioctl (oss->mixer_fd, SOUND_MIXER_READ_CAPS, &oss->mixcaps) < 0) {
423 GST_DEBUG ("Failed to get device masks - disabling mixer");
424 close (oss->mixer_fd);
430 #ifdef SOUND_MIXER_INFO
431 if (ioctl (oss->mixer_fd, SOUND_MIXER_INFO, &minfo) == 0) {
432 oss->device_name = g_strdup (minfo.name);
435 oss->device_name = g_strdup ("Unknown");
438 /* find master volume */
439 if (devmask & SOUND_MASK_VOLUME)
440 master = SOUND_MIXER_VOLUME;
441 else if (devmask & SOUND_MASK_PCM)
442 master = SOUND_MIXER_PCM;
443 else if (devmask & SOUND_MASK_SPEAKER)
444 master = SOUND_MIXER_SPEAKER; /* doubtful... */
445 /* else: no master, so we won't set any */
447 /* build track list */
448 for (i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
449 if (devmask & (1 << i)) {
450 GstMixerTrack *track;
451 gboolean input = FALSE, stereo = FALSE, record = FALSE;
453 /* track exists, make up capabilities */
454 if (MASK_BIT_IS_SET (oss->stereomask, i))
456 if (MASK_BIT_IS_SET (oss->recmask, i))
458 if (MASK_BIT_IS_SET (oss->recdevs, i))
461 /* do we want this in our list? */
462 if ((dir == GST_PAD_SRC && input == FALSE) ||
463 (dir == GST_PAD_SINK && i != SOUND_MIXER_PCM))
466 /* add track to list */
467 track = gst_ossmixer_track_new (oss, i, stereo ? 2 : 1,
468 (record ? GST_MIXER_TRACK_RECORD : 0) |
469 (input ? GST_MIXER_TRACK_INPUT :
470 GST_MIXER_TRACK_OUTPUT) |
471 ((master != i) ? 0 : GST_MIXER_TRACK_MASTER));
472 oss->tracklist = g_list_append (oss->tracklist, track);
478 gst_ossmixer_free_list (GstOssElement * oss)
480 if (oss->mixer_fd == -1)
483 g_list_foreach (oss->tracklist, (GFunc) g_object_unref, NULL);
484 g_list_free (oss->tracklist);
485 oss->tracklist = NULL;
487 if (oss->device_name) {
488 g_free (oss->device_name);
489 oss->device_name = NULL;
492 close (oss->mixer_fd);